Publications
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Volcanic substructure inferred from dredge samples and ocean-bottom photographs, Hawaii
Ocean-bottom photographs from 18 stations and dredge hauls from 35 stations adjacent to the Island of Hawaii indicate that basaltic pillow lava and pillow fragments are the dominant rock type on the crest and flanks of the submarine rift zone ridges, whereas glassy basalt sand and scoria are the dominant type on the submarine flanks of the volcanoes directly downslope from land. These relations in
Authors
James G. Moore, Richard S. Fiske
Analysis of a 24-Year photographic record of Nisqually glacier, Mount Rainier National Park, Washington
A systematic coverage of Nisqually Glacier by photographs taken from a network of stations on the ground was begun in 1942 to explore the value and limitations of such photographs as an aid in glacier study. Principles developed may be of value elsewhere, especially for the program 'Measurement of Glacier Variations on a World-Wide Basis' of the International Hydrological Decade.
Nisqually Glacie
Authors
Fred M. Veatch
Mineralogy of sulfides from certain Hawaiian basalts
Polymineralic sulfide grains, composed principally of Fe sulfide and Fe-Cu sulfide, with magnetite, have been studied mineragraphically and by electron probe, and interpreted in terms of experimental data for the system Fe-Ni-Cu-S. The three main phases are monosulfide solid solution, a Cu-Fe sulfide (solid solution) with composition near cubanite, and Ti-free magnetite. The grains are believed to
Authors
G. A. Desborough, Alfred T. Anderson, Thomas L. Wright
Article navigation zonal distribution of variations in structural state of alkali feldspar within the Rader Creek pluton, Boulder Batholith, Montana
The granodioritic Rader Creek pluton of the composite Boulder batholith contains microperthitic alkali feldspar of bulk composition Or65 to Or86 with a structurally variable potassic phase. Complete cell parameters, 2V measurements, and bulk composition are given for 11 feldspar samples. The 131 and 131 reflections for these and 58 additional samples show the following structural types in the pota
Authors
Robert I. Tilling
Argon-40: Excess in submarine pillow basalts from Kilauea Volcano, Hawaii
Submarine pillow basalts from Kilauea Volcano contain excess radiogenic argon-40 and give anomalously high potassium-argon ages. Glassy rims of pillows show a systematic increase in radiogenic argon-40 with depth, and a pillow from a depth of 2590 meters shows a decrease in radiogenic argon-40 inward from the pillow rim. The data indicate that the amount of excess radiogenic argon-40 is a direct f
Authors
G. Brent Dalrymple, James G. Moore
The role of olivine in the crystallization of the prehistoric Makaopuhi tholeiitic lava lake, Hawaii
On eruption, the tholeiitic basalt lava of the prehistoric Makaopuhi lake contained nearly seven percent euhedral olivine phenocrysts of approximately Fa14 composition. In the center of the 225 foot vertical section of the lake, the lava became more than 90 percent solid at 1000° C after about 30 years. At the surface the lava was quenched to air temperature, whereas, at the bottom, quenching to 8
Authors
James G. Moore, B.W. Evans
Volcanic hazards at Mount Rainier, Washington
Mount Rainier is a large stratovolcano of andesitic rock in the Cascade Range of western Washington. Although the volcano as it now stands was almost completely formed before the last major glaciation, geologic formations record a variety of events that have occurred at the volcano in postglacial time. Repetition of some of these events today without warning would result in property damage and los
Authors
Dwight Raymond Crandell, Donal Ray Mullineaux
The September 28–30, 1965 eruption of Taal Volcano, Philippines
A moderately violent phreatomagmatic explosive eruption of Taal Volcano, Philippines, occurred from 28 to 30 September, 1965. The main phreatic explosions, which were preceded by ejection of basaltic spatter, opened a new crater 1.5 km long and 0.3 km wide on the southwest side of Volcano Island in Lake Taal. The eruption covered an area of about 60 square kilometers with a blanket of ash more tha
Authors
James G. Moore, K. Nakamura, A. Alcaraz
Gravity slide origin of rift zones of some Hawaiian volcanoes
The east-trending east rift zone of Kilauea volcano on the island of Hawaii is 50 km long and up to 3 km wide. It consists of three elements arranged roughly in three belts from north to south: 1) eruptive fissures, cracks, faults, and narrow grabens, 2) cinder cones (produced by eruptions more localised than the fissure eruptions), and 3) pit craters. Eruptive vents, either fissure or cone, do no
Authors
James G. Moore
Structure, metamorphism, and plutonism in the south-central Klamath Mountains, California
In the south-central Klamath Mountains 50 miles of the the north-trending central metamorphic belt and adjacent parts of the eastern Paleozoic and western Paleozoic and Triassic belts have been mapped and studied in detail. Within the central metamorphic belt a sequence of three lithologically distinctive metamorphic units has been recognized (from bottom to top): (1) siliceous metasedimentary roc
Authors
Gregory A. Davis, M. J. Holdaway, Peter W. Lipman, W. D. Romey
Geologic map of the Topopah Spring SW quadrangle, Nevada
No abstract available.
Authors
Peter W. Lipman, E. J. McKay
Geologic map of the Topopah Spring NW quadrangle, Nye County, Nevada
No abstract available.
Authors
Robert L. Christiansen, Peter W. Lipman